[c-nsp] necessity of nowadays

Mark Tinka mark.tinka at seacom.mu
Wed Mar 23 07:40:32 EDT 2016

On 23/Mar/16 13:20, Sebastian Beutel wrote:

> Hi List,
>     i've been pondering about the real need for udld nowadays, each time it
> bites me in a case of false positive. At least since we have gigabit SFPs it
> became almost impossible to willfully provoke an unidirectinal link: The
> physical port allready detects missing light and goes down.
>     Moreover, the main use of udld (prevent unidirectional loops in an stp
> topology) has also lost importance since link aggregation has replaced load
> balancing via multiple or per vlan stp topologys.
>     That's why i am asking myself whether udld is a residue that nowadays
> causes more harm than it prevents and should therefore not be used anymore.
> At least on gigabit and faster links and if there are no really dumb
> media converters involved.
> What do you think?

I considered UDLD once (back in '09), but never used it.

I've never ran UDLD, and we have lots of optical links. Not seen any
issues with not having this in the last 6x years.


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